| A | B |
|---|
| digestion | the process that breaks down large food molecules into simpler molecules that the organism can use |
| diffusion | the movement of molecules from areas of high concentration to areas of low concentration; requires use of no energy |
| enzymes | proteins that speed up the rate of chemical reactions in living things |
| excretion | the removal of all the wastes produced by the cells of the body |
| homeostasis | the ability of an organism to maintain a stable internal environment even when the external environment changes |
| hormone | a chemical produced in the endocrine glands |
| immunity | the body's ability to destroy pathogens before they cause disease |
| inorganic | a type of molecule that does not contain both carbon and hydrogen but can contain any other combination of elements |
